Was a great episode, but killing Ana Lucia is such a waste of a character (if she is dead). They already blew it by killing Boone and then doing nothing with Shannon. Now this? Hella weak.

As far as Libby dying goes, it lets Hurley go all Tom Hansen and blame himself for the death. Instead of obsessing over everything he could do in 3.3 seconds, Hurley will start naming all the things he could've done if he had brought a blanket...